For many of the same reasons others have listed:
- Pleasure of seeing and manipulating physical objects (and I hate touch screens!)
- Previous investment in hardware and software - I moved off vinyl when going to university in the mid-80s and a) it was much easier to move CDs around and b) CD was cool, back then.
- Ease of planning listening vs. streaming for classical. Admittedly, my only limited experience of streaming was a 3-months free sub to Spotify that came with a car. Finding anything classical on Spotify is a PITA.
- More money in the artist's pocket
I'm 'returning' to audio (vs. music - which I have never left) as my system from 30 years ago has broken down in a couple of places, and while the priority is to get back to where I was (able to listen to a CD without hum or crackles) streaming is interesting as a way to access new music.